$bady-bg: #f8f9fb;
$body-color: #333;

body {
    margin: 0 auto;
    padding: 20px;
    max-width: 800px;
    background-color: $bady-bg;
    color: $body-color;

    header {
        text-align: center;
        font-size: 18px;
        color: red;
    }
    div {
        font-size: 14px;
    }
}